Framework for risk-based pillar design in underground mines

Purpose and goal:

The aim of this project is to apply risk-based assessment methods for pillars in Swedish underground mines in hard rock conditions. The risk-based methods are to be based on probabilistic design tools. The specific research objective is to develop a framework for the use of risk-based design tools for the rock mechanics design of pillars (e.g. rib pillars, sill pillars) in underground mining.

Expected results and effects:

The study is expected to result in a framework that will contribute to improved design with regard to acceptable levels of risk in the mines. There are few published cases concerning probabilistic design and risk-based decision-making for underground mines, and there is a great potential to develop this area. The study is an important step towards the application of these methods, which is ultimately judged to be able to provide better rock mechanical decision support, quantitative risk management, a safer working environment and improved production efficiency.

Approach and implementation:

The project is divided in six work packages (WPs) and will run for a duration of 18 month. The WPs involves (1) Project coordination, (2) Documented rock pillar cases, (3) Probabilistic description of rock masses, (4) Probabilistic design tools for rock pillars, (5) Risk-based design framework for rock pillars and (6) Reporting and External Communication.

The main deliverables of the project are one technical paper (to a conference and/or journal) and one final report which will be delivered to all partners at the end of the project.